WO2004064435A1 - Procede de transfert intercellulaire d'au moins un appareil de radiocommunication, appareil de radiocommunication associe et systeme de radiocommunincation - Google Patents

Procede de transfert intercellulaire d'au moins un appareil de radiocommunication, appareil de radiocommunication associe et systeme de radiocommunincation Download PDF

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Publication number
WO2004064435A1
WO2004064435A1 PCT/EP2003/010299 EP0310299W WO2004064435A1 WO 2004064435 A1 WO2004064435 A1 WO 2004064435A1 EP 0310299 W EP0310299 W EP 0310299W WO 2004064435 A1 WO2004064435 A1 WO 2004064435A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio
cell
radio cell
group service
communication device
Prior art date
Application number
PCT/EP2003/010299
Other languages
German (de)
English (en)
Inventor
Martin Hans
Michael Eckert
Hyung-Nam Choi
Mark Beckmann
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10301089A external-priority patent/DE10301089A1/de
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU2003270206A priority Critical patent/AU2003270206A1/en
Publication of WO2004064435A1 publication Critical patent/WO2004064435A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the invention is based on the object of demonstrating a way in which a soft handover of at least one radio communication device can be carried out in a radio communication system in a reliable and efficient manner which transmits data of one or more group messages to this radio communication device as part of a group service. This object is achieved with the following method according to the invention:
  • Method for soft handover of at least one radio communication device that is a member of at least one group service for receiving common group messages in a radio communication system by transmitting radio-cell-specific information to the radio communication device in its local radio cell from at least one network component of the radio communication system via at least one air interface, which radio channels are in which Neighboring radio cells are used for the transmission of data of the respectively selected group service, and that this transmitted, radio cell-specific information is used to carry out the soft handover.
  • the invention further relates to a radio communication device which is designed to carry out the method according to the invention.
  • the invention also relates to a radio communication system which is designed to carry out the method according to the invention.
  • FIG. 1 shows a schematic representation of a radio communication device of a radio communication system in its current residence radio cell, the radio communication device being registered as a member of a group service for receiving the data of one or more group messages,
  • FIG. 2 shows a schematic representation of a radio-cell-specific system information signal which is transmitted from the base station in the residence radio cell of the radio communication device according to FIG. 1 to radio-cell-specific information about the radio channels used for the selected group service in the neighboring radio cells and in the own residence radio cell together with the Transmit radio communication device according to a first variant of the soft handover method according to the invention
  • FIG. 3 shows a schematic representation of the conditions for the separate transmission of radio-cell-specific system information signals from the neighboring radio lines and the radio commu- Nication device for receiving radio cell-specific information about the radio channels of the neighboring radio lines used for the selected group service and the own residence radio cell according to a second variant of the method according to the invention.
  • MBMS multimedia broadcast and multicast service
  • UMTS Universal Mobile Telecommunications System
  • MBMS multimedia broadcast and multicast service
  • This is a group service or group service, in which the same data is transmitted to a group of one or more, preferably to a plurality of radio communication devices simultaneously.
  • this means that a point-to-multipoint transmission is established for the transmission of the data of a group message to the radio communication devices of the members of such a group service.
  • the MBMS data to be transmitted in each case are ideally only sent once via common connection paths from the respective transmitter to the receivers of the respective group service.
  • the respective transmitter of such group messages is formed by the base station of each radio cell in which the radio communication devices of the members of the respective group service reside as receivers.
  • group services can advantageously reduce the bandwidth required in the radio communication network and on the air interface between the subscriber devices which are assigned to the respectively selected group service and the base station of the respective radio cell in which these subscriber devices are located.
  • Group services are used, for example, to distribute group messages to news groups, to video conference participants, video-on-demand participants, to participants in distributed applications, etc
  • a radio communication device in particular a mobile station MSI such as a mobile radio device, is located in the radio cell FZA of a UMTS radio communication system.
  • the mobile station MSI represents a large number of other subscriber devices in the multimedia broadcast and multicast service MBMS1, which have been omitted from FIG. 1 for the sake of clarity.
  • the mobile station MSI receives data that are addressed to or addressed to it by the network from two or more transmitting base stations simultaneously.
  • the mobile station MSI in its current location radio cell FZA captures data from the base station BS1 there and from the base stations BS2, BS3 in the two adjacent radio cells FZB, FZC.
  • the radio communication devices Via radio cell-specific system information signals, the radio communication devices, in particular mobile stations, are informed in the respective radio cell information which, for example, provides and enables the logon to the network and the establishment and maintenance of services.
  • 3GPP TS 25.331 V3.11.0 Radio Resource Control (RRC), Protocol Specification ", Release 1999 specifies in particular that in the system information block 11 (S B1) in the information element" Cell Info "it is communicated which neighboring radio cells are present and on which radio channels measurements can be carried out there.
  • RRC Radio Resource Control
  • the mobile station MSI receives such radio cell-specific information SIA in its location radio cell FZA, in that the base station BS1 there emits at least one system information signal FIA via at least one radio channel, which is assigned to the radio communication devices that may be located there.
  • radio-cell-specific are generally expressed by at least one network component of the radio communication system via at least one air interface Transmit information to the radio communication device in its sojourn radio line about which radio channels are used in which neighboring radio cells for the transmission of data of the respectively selected group service. This transmitted, cell-specific information is then used to carry out the soft handover.
  • the mobile station MSI is already receiving the radio cell-specific information from the base station BS1 using the system information signal FIA alone. ons SIA * via the radio channel FKA used for the selected group service MBMSl in their own residence radio cell FZA and via the radio channels FKB, FKC used for the selected group service MBMSl in the neighboring radio cells FZB, FZC (see FIG. 3).
  • the radio cell-specific information SIA * about the three radio channels FKA, FKB, FKC used for the selected group service MBMS1 of the own local radio cell FZA and of the two neighboring radio cells FZB, FZC are therefore already complete, ie together in the radio cell-specific system information signal FIA from the base station BS1 Mobile station MSI transmitted.
  • This radio-cell-specific information SIA * about the channels FKA, FKB, FKC used for the selected group service MBMS1, the own local radio cell FZA and the two neighboring radio lines FZB, FZC are shown schematically as part of the system information signal FIA in FIG. 2 in the form of a table.
  • the respective radio communication device belonging to the selected group service MBMS1 is simultaneously, ie collectively, also the radio cell-specific information about the radio channels used for the selected group service of one or in the same system information signal several neighboring radio cells transmitted.
  • this can advantageously be achieved in that the already existing system information signal, which is emitted anyway from the base station of the residential radio cell, is used to transmit the radio cell-specific information, such as SIA *, via the radio channels used for the selected group service, such as FKA, FKB, FKC is supplemented or expanded accordingly.
  • the respective existing radio cell-specific system information signal is preferably supplemented by the following information elements or parameters:
  • MBMS ID MBMS service identity
  • radio cell ID radio cell identity
  • Radio channel ID Radio channel used
  • the system information signal FIA has these supplementary parameters in tabular form with the following content:
  • Radio cell identity FZA, FZB, FZC associated radio channel used for the selected group service MBMSl: FKA, FKB, FKC.
  • the mobile station MSI of FIG. 1 is informed with the aid of the system information signal FIA and the radio cell-specific information SIA * contained therein that the MBMS group service MBMS1 in the radio cell FZA on the radio channel FKA, in the radio cell FZB on the radio channel FKB, and is transmitted in the radio cell FZC on the radio channel FKC.
  • the respective radio communication device only receives the system information signal of its own to receive the respective group service Residence radio cell needs to listen and not to the system information signals of the neighboring radio cells in order to find out on which radio channels of the neighboring radio cells the selected group service is transmitted.
  • the respective radio communication device detects and reads out one or more system information signals of its own radio cell which are expanded according to the invention. It then has all the information needed to access the radio channels the neighboring radio cells on which a specific, selected group service is transmitted.
  • the respective radio communication device involved in the selected group service is configured internally in this way that it then listens to the radio channels of the own local radio cell and the neighboring radio lines for receiving the data of the respectively selected group service.
  • the radio cell-specific information may also be expedient for the radio cell-specific information to be transmitted separately to the radio communication device via separate radio cell-specific system information signals via the radio channels of the neighboring radio lines used for the selected group service and the own radio cell of the respective radio communication device involved in the selected group service become.
  • the system information signals which are radiated from the base stations into their associated radio cells, are only expanded by information elements from which a radio communication device involved in the group service can determine which radio channel or which radio channels are in their own radio cell and not in neighboring radio cells for them Transmission of data from a specific, selected group service can be used.
  • the respective mobile station involved in the selected group service therefore reads the system information signals of accessible neighboring radio cells in addition to the system information of its own current stay radio cell.
  • This modified soft handover concept is specifically shown in FIG. 3 for the mobile station MSI. shows.
  • the mobile station MSI detects the system information signal FIA *, which is now only supplemented by the system information SIA * corresponding to line ZI in the table in FIG.
  • the system information signal FIA * thus only contains additional information about the radio channel FKA used for the selected group service MBMS1 in the local radio cell FZA.
  • the mobile station MSI also separately detects the system information FIB * of the neighboring radio cell FZB, which now only includes the additional information about the radio channel FKB used for the selected group service of the neighboring radio cell FZB.
  • the system information signal FIB * thus has the radio cell-specific information about the radio channel FKB used for the selected group service MBMS1 in the radio cell FZB in accordance with row Z2 of the table in FIG. 2.
  • the mobile station MSI listens to the system information signal FIC * which is emitted by the base station BSC of the neighboring radio cell FZC.
  • the mobile station MSI detects three different system information signals FIA *, FIB *, FIC * separately from each other (and not just a common system information signal in its own radio cell). It reads from the system information signal FIA *, FIB *, FIC * sent separately by each base station BS1 with BS3 the additional information contained for each radio cell FZA, FZB, FZC about the radio channel provided for the selected group service in a cell-specific manner.
  • the respective radio communication device involved in the selected group service After reading out the radio cell-specific information about the radio channels used for the selected group service in the own residence radio cell as well as in one or Several neighboring radio cells, the respective radio communication device involved in the selected group service is configured internally in such a way that it then listens to the radio channels of its own residence radio cell and the neighboring radio cells for receiving the data of the respectively selected group service.
  • the respective radio communication device involved in the selected group service is configured internally in such a way that it then listens to the radio channels of its own residence radio cell and the neighboring radio cells for receiving the data of the respectively selected group service.
  • configurations are made in order to store data of the selected group service MBMS1 on the radio channel FKA in the local radio cell FZA, on the Radio channel FKB of the neighboring radio cell FZB, and on the radio channel FKC of the neighboring radio cell FZC can be received and combined at the same time.
  • information can be provided in a simple and efficient manner for a radio communication device that participates in a specific, selected group service, which radio channels are located in which neighboring radio cells and, if appropriate, which radio channel is also in their own location radio cell for the transmission of data from the respective selected group services.
  • This enables the simultaneous reception and combination of the data of the respectively selected group service from different base stations, whereby an improvement in the transmission quality and a reduction in transmission errors on the air interface can be achieved.
  • the respective system information signal such as FIA or FIA * is preferably transmitted on the P-CCPCH radio channel (Primary Common Control Physical Channel) in the respective location radio cell of the radio communication device belonging to the selected group service and the neighboring radio cell concerned.
  • P-CCPCH radio channel Primary Common Control Physical Channel
  • it is therefore advantageous in modern radio communication systems, such as according to the UMTS or GPRS standard (GPRS General Package Radio Service), to expand the system information already emitted by the respective base station by additional information elements, from which one is added to the one selected Group service associated mobile station learns or is informed which radio channels are used in neighboring radio cells and, if appropriate, additionally in the own radio cell for the transmission of data of the specific, selected group service.
  • At least one radio channel is used as the radio channel for the transmission of the data of the respectively selected group service in the respective neighboring radio line and, if necessary, additionally in the respective residence radio cell of the radio communication device belonging to the selected group service, which is used jointly by the members of the selected group service there Is made available.
  • S-CCPCH Servicedary Common Control Physical Channel

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transfert intercellulaire d'au moins un appareil de radiocommunication (MS1) appartenant à au moins un service groupe (MBMS1) d'un système de radiocommunication pour recevoir des messages de groupe communs. A cet effet, des informations spécifiques à une cellule radio (SIA*) et indiquant les canaux radio (FKB, FKC) dans lesquels sont utilisés les cellules radio voisines (FZB, FZC) pour la transmission des données du service de groupe (MBMS1) respectivement sélectionné, sont transmises d'au moins un composant réseau (BSA) à la cellule radio de séjour (FZA) de l'appareil de radiocommunication (MS1) par au moins une interface hertzienne.
PCT/EP2003/010299 2003-01-14 2003-09-16 Procede de transfert intercellulaire d'au moins un appareil de radiocommunication, appareil de radiocommunication associe et systeme de radiocommunincation WO2004064435A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003270206A AU2003270206A1 (en) 2003-01-14 2003-09-16 Soft-handover method of at least one radio communications device, corresponding radio communications device and radio communications system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10301089.0 2003-01-14
DE10301089A DE10301089A1 (de) 2002-08-26 2003-01-14 Verfahren zum Soft-Handover mindestens eines Funkkommunikationsgeräts, zugehöriges Funkkommunikationsgerät sowie Funkkommunikationssystem

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WO2004064435A1 true WO2004064435A1 (fr) 2004-07-29

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PCT/EP2003/010299 WO2004064435A1 (fr) 2003-01-14 2003-09-16 Procede de transfert intercellulaire d'au moins un appareil de radiocommunication, appareil de radiocommunication associe et systeme de radiocommunincation

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AU (1) AU2003270206A1 (fr)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000038439A2 (fr) * 1998-12-21 2000-06-29 Ericsson Inc. Systemes et procedes pour faciliter le changement de cellules dans une station mobile, y compris des procedes de changement de cellules inter-bsc lors d'appels de groupe
WO2001047293A2 (fr) * 1999-12-20 2001-06-28 Ericsson Inc. Procede ameliore d'affectation des cellules pendant les appels de groupes
WO2003065751A1 (fr) * 2002-01-29 2003-08-07 Nokia Corporation Selection repetee des cellules dans un systeme radio cellulaire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000038439A2 (fr) * 1998-12-21 2000-06-29 Ericsson Inc. Systemes et procedes pour faciliter le changement de cellules dans une station mobile, y compris des procedes de changement de cellules inter-bsc lors d'appels de groupe
WO2001047293A2 (fr) * 1999-12-20 2001-06-28 Ericsson Inc. Procede ameliore d'affectation des cellules pendant les appels de groupes
WO2003065751A1 (fr) * 2002-01-29 2003-08-07 Nokia Corporation Selection repetee des cellules dans un systeme radio cellulaire

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